| http://www.w3.org/ns/prov#value | - vertical wall; a semicircular ram block having a recess at the lower corner of the straight side; a complete shut-off rubber on said ram block, said rubber including a portion in said ram block recess and a portion around the semicircular portion of the ram block, said ram block and rubber being operably secured in said recess of the ram block holder with the upper edge portion of the arcuate por
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